Maybe not on electricity expenses for the lamps themselves. However you will save on things like replacement bulbs, labor replacing bulbs, servicing reflectors, and an overall reduction of load on the HVAC systems in place. These cobs experience very little output depreciation at the temps and power levels most are driving them at.
does that mean your an engineer ? lol ok I get it ... LOL, there is more than sun moving through its daily cycle. there is also seasonal changes and the status of air pollution over the test area.
Even without giving up on HID altogether, one can still register a big improvement by stepping up to 315W CMH lighting. I'm not convinced of the ultimate efficiency of DE HPS, maybe I'm just a diehard skeptic.
whats startup cost for a TOP of the line DE cmh system ? Best reflectors, best ballast etc.
I don't think there are any DE CMH bulbs around yet. Just normal MH/HPS IIRC.
Are you talking watt for watt, or matched PPF output? Running at 60% or higher efficiency is expensive up front, but depending on the scale of the grow, the ROI could be made back much quicker than you seem to think just from power consumption. Even at 56ish% (3070@1.4A) the difference in actual measurable light output watt for watt destroys any top of the line HPS setup with a fuller spectrum to boot. The increase in yield and quality should more than make up for the cost difference, especially as the grow is scaled up.
I'll be putting this to the test. Soon.
What do you mean save on replacement bulbs ?? The newest technology in High Pressure Sodium are the Double Ended HPS bulbs. These bulbs degrade slower than traditional single ended HPS bulbs. In fact, after 10,000 hours double ended lamps will still output approximately 90% of their original intensity. Double Ended HPS bulbs are also more stable than traditional single ended HPS bulbs, and this allows them to have a 10% increase in light intensity and PAR output over traditional single ended HPS bulbs. Lastly, Double Ended HPS bulbs emit more UV and IR light than traditional single ended HPS bulbs, increasing the potency and essential oils of oil producing plants
Look it up yourself, smart guy; high quality COBs like the Cree CXB3590 last 50,000 hours at their rated output, and most people run them softer which dramatically INCREASES lifespan. I'm putting lenses on mine specifically to protect them so they'll last for ten years or more. By then they'll be obsolete- but I'm betting they'll still be working just fine. Light degradation isn't an issue, either.
Really now 50,000 hrs have you or anyone you know run them that long ???? just saying also out of curiosity how would these fair in green house humid area's after time ?????
a) backup your old claims, i'm still waiting for proofReally now 50,000 hrs have you or anyone you know run them that long ???? just saying also out of curiosity how would these fair in green house humid area's after time ?????
again know one really knows are these cobs actually designed for high VPD area's or made for actual growing ??? or is it some stoner with knowledge and time figured out hey these will work but actual company cree made them not for green houses but for hall way lighting lol where they will never see high heat or humidity again just saying ..
I think i make valid points in all above
Truth is
The life span which Cree (for example) claims basically means that at that point, their fixture will be emitting at least 70% of the amount of its original brightness.
So yes, they will dim- in varying amounts.
The nice thing is though, for them to make that claim is warranty will be long gone well before the 50k hour time frame, right
But it's a good question. How can we really test the 50k hour claim? The way I figure, I go with the trusted companies-
Even then though, someone can be using Cree's or the best bins etc but if they build a crappy fixture around it, all of Cree's quality will be practically meaningless.
So with that said you know anyone that has pushed there cob units 50 k hrs YET ?? thats 2083 days 6 years
awe yeah shits not been out that long ,,
As i am new to this cob led area Don't claim that you can surely say that you will not see degradation in Cobs That is being ridiculous... even if using them at lower power or dim able cause then again i am no scientist but in theory as spectrums are also referred to kelvin temps your 4000 K so called cob unit running at half power may be infact not 4000 k unit right ????
Many or most of the white LEDs use a phosphor. It is the phosphor that degrades with time and use.
Now to my understanding yes EVEN CREE CHIP ON BOARD or as many call it COB use phos coated Disc's ??????
But all lamps do this to some degree. The phosphors in fluorescent lamps also degrade and their light declines over time. Incandescents' envelopes darken as the tunsten boils off the filament and deposits on the cooler envelope, and this blocks some of the light output. (This effect is reduced but not eliminated in halogen lamps).
Falling light output is inevitable with all lamps, to one degree or another. Perhaps it is more significant in LEDs because of their very long theoretical life.
However, note that the 40k or 50k hour LED life rating is always an average. LED lamps may fail prematurely, just as compact fluorescents do. Other than the outright cr@p that you buy on Ebay and at fly by night online retailers, we are probably not seeing too much of this early failure yet because until recently LEDs have been expensive, limited production items.
As LED production is increased and transferred to China and other low-wage nations, and as price competition heats up, cost cutting will become more common and quality will decline. Then we are likely to see more premature LED failures. Consumers will complain about 50k hour rated LEDs that last only a few thousand hours, even though some of their other LEDs last 100k hours or more. That is the way people are.
He's a babbling idiot, just here to be disruptive, knows exactly nothing about that of which he speaks- on any subject, it seems. At least he's consistent.
WTF you mean Back up my claims ?? What am i claiming here meat head the 50,000 hrs what do you think @ 50,000 hrs there going to be 100 percent from the day you plugged them in ???
( You like aggresivity, huh ? I'l try and talk your language ...)
exactly so they look at how its degrading over time and add it all up into saying the ligh should emit min 70 percent @ the 50 k mark ,, I didn;t come in here to start a pissing match but to think cause someone dims there Diy unit is going to mean its going to last longer haha rings Hollow again who really knows and most importantly like my EXample
